TECH LETTERS

摘要

Q Would you explain horsepower and torque in relation to an engine? I've asked several people who are experienced mechanics, but they can't explain it. What is 1 hp and what does it have to do with torque?rnA To understand what 1 hp is, it's helpful to know where the term and unit of measure originated. Steam engine inventor James Watt needed a way to equate the power of his invention to the average man. At the time, horses were the widest used means of producing power and accomplishing work beyond the strength of a man, so he devised a way to create a unit of measure that could compare the two equally.